The All-Purpose Lightweight Individual Carrying Equipment (also know as “ALICE Pack”), was first introduced by United States Army in 1974. The ALICE pack was intended as a replacement to the aging M-1956 Load-Carrying Equipment [LCE] and M-1967 Modernized Load-Carrying Equipment.
The ALICE pack has become popular with the players of airsoft and paintball. The popularity of the ALICE pack is due to the quality of the materials it is made out of, its easy to customize, and the packs area easy to find in most military surplus stores.
With the introduction of MOLLE packs on the market, there has been a shift from the ALICE pack to the MOLLE pack. Personally, I think the alice packs are more durable then the MOLLE packs. The ALICE pack frames are aluminum and will not break like the MOLLE pack.
The military service people that I have talked to prefer the ALICE packs over the MOLLE pack, mainly due to the plastic frame of the MOLLE breaking.